Pay-Per-Click marketing is for sending traffic to websites with targeted ads.
One of the most popular PPC networks is Google Ads. With the AdSense code, ads from Google will be placed on your site.
As with SEO, there are plenty of courses you can take to quickly learn PPC online. There are a few that allow you to gain a Google Certification for PPC Ads (link in Resources section below).
Why is that needed?
To be honest, it’s not completely necessary.. but once you get that accreditation, you’ll have the necessary experience to get your own clients.
Gaining certification positions you as an expert in a subject, field or topic. It greatly increases your KLT (know, like and trust) factor, making potential clients or customers more likely to purchase from you.